897213175922 has 30 divisors (see below), whose sum is σ = 1570144506093. Its totient is φ = 384491801736.

The previous prime is 897213175921. The next prime is 897213175949. The reversal of 897213175922 is 229571312798.

It can be written as a sum of positive squares in 2 ways, for example, as 835032267601 + 62180908321 = 913801^2 + 249361^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=669781.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (897213175921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 65631704 + ... + 65645372.

Almost surely, 2^897213175922 is an apocalyptic number.

897213175922 is a deficient number, since it is larger than the sum of its proper divisors (672931330171).

897213175922 is an frugal number, since it uses more digits than its factorization.

897213175922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27368 (or 13678 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 56.

The spelling of 897213175922 in words is "eight hundred ninety-seven billion, two hundred thirteen million, one hundred seventy-five thousand, nine hundred twenty-two".